{
{
{     This request will return the amount of space remaining in a
{     system buffer.
{
{ BAP$AVAILABLE_BUFFER_SPACE (KFT_DESCRIPTOR,SBD_PTR,AVAILABLE_SPACE,
{                               PVA,START_INDEX,STATUS)
{
{   KFT_DESCRIPTOR : (input) this parameter specifies the known file
{                     name table entry.
{
{   SBD_PTR : (input) this parameter specifies a pointer to the system
{            buffer descriptor of the system buffer to interogate.
{
{   AVAILABLE_SPACE : (output) this parameter specifies the amount of
{                    space remaining in the current system buffer.
{
{   PVA : (output) this parameter specifies a pointer to an adaptable
{          array.
{
{   START_INDEX : (output) this parameter specifies the starting index
{                  to the adaptable array pva.
{
{   STATUS : (output) this parmeter specifies request status.
{
{
